The HKS modules (E, K, N and Z) makes the HKS palette colours available directly in the colour dialog. You can now transfer individual HKS colours to the colour list and then work with them almost as with normal colours, though it is not possible to alter the process colour values as these already correspond to the ideal values.
The HKS modules make available percentage values of the process colours that are optimized for standard printing output. With it you will get the best possible approximation in the printed output to what you see on the screen, though with some colours it unfortunately does not always correspond to the ideal. The colour reproduction on the screen is greatly dependent on the monitor as well as the graphics card used.